Core box for ingot molds



vJuly 14, 1931. J. E. PERRY CORE BOX FOR INGOT MOLDS Filed March 23, 1928 5 Sheets-Sheet 1 July 14, 1931. J. E. PERRY CORE BOX FOR INGOT MOLDS Filed March 23, 19 28 3 Sheets-Sheet a ill.-

f 5: I I Qvwentoz Jo/222171 617 9 Patented July 14, 1931 trio's JOHN EDMUND PERRY, OF YOUNGSTOWN, OHIO, ASSIGNOR TO VALLEY MOUID AND 7 IRON CORIPOB-ATION, OF HUBBARD, 01110, A GQRPGBATION OF YORK GORE BOX FER ENG-'1 MOLDS Application filed. March 23, 1928. Serial No. 263,996.

The present invention relates broadly to metallurgy and more especially to a core box for use in ramming core bars for ingot molds.

The present invention contemplates a core bar ramming set-up comprising a cast iron ramming base adapted to definitely and rigidly support a cast iron core bar base so that the cast iron core bar is accurately centered for the ramming base. A core box prefer ably comprising separate Wooden sides is adapted to be assembled upon the ramming base and with the bottom of the wooden core box being definitely positioned on the ramming base by interlocking members such as centering pins or dowel pins and with the sides of the wooden box being interlocked one with another whereby the base of the wooden box is accurately positioned relative to the core bar within the box. The ramming base carries a rigid arm extending upwardly to the top of the wooden core box to permit a centering member to fixedly secure the top of the core box to the rigid arm thereby accurately centering the top of the core box relative to the general set-up.

The foregoing construction results n an inexpensive core bar ramming box with the parts accurately and fixedly assembled whereby core bars may be accurately sanded and economically produced. The construc tion further lends itself tothe production of various sized core bars, by changing the dimensions of thewooden boxes without changing the casting base or requiring the manufacturer to carry a large stock of expensive parts. i

Other and further objects of the present invention will in part be obvious and will in part be pointed out hereinafter by reference to the accompanying drawings forming a part of the presentspecifi'cation.

Realizing that the present invention may be embodied in structures other than those specifically disclosed herewith, the present disclosure is to be understood as being illustrative and not in the limiting sense.

Fig. 1 is an elevational View taken on section line 1-1 of Fig. Q'showing portions of the device in cross-section.

Fig. 2 is a cross section'plan view taken on line 22 of Fig. 1.

Fig. 3 is a plan view of the device showing the parts assembled.

Fig. 4. is a detail view of a portion of the core box with the sides slightly separated.

Fig. 5 is a detail perspective view of the upper end of the core box with the sides assembled.

Referring now to the drawings, which illustrate a preferred embodiment of the present invention, a ramming base 1 carries a guide post 2, and is provided with a recess adapted to receive a core bar base 4 carrying the vertical rigid core bar 5. The ramming base is provided with machined faces 6 adapted to form an accurate seat for machine faces 7 on the core bar base 4, whereby the core bar 5 is accurately positioned relative to the ramming base 1 and the guide post 2. The core box comprises long side members 8 and 9 adapted to fit into short side members 10 and 11 to form a core box which in most cases is substantially rectangular in cross section. The side members 8, 9, 10 and 11 are preferably formed of wood and are reenforced by cross bars 12 which extend across the side members in the form of supporting bars. Preferably, the corners of the matrix of the core box are rounded and the joints between the several side members preferably occur at these rounded portions. The side members are fitted together by interlocking members, for example the long side members 8 and 9 carry dowel pins 14 while the short side members are provided with sockets 15 in which the dowel members set, so as to prevent the parts from separating when the space between the core box and the core bar is being rammed with sand. Preferably, interlocking hinged-like members 16 and 17 may be carried by the cross bars 12 and when the side members of the core box are assembled, locking pins 18 may be inserted to lock the hinged-like members together and rigidly support the sides of the core box, so as to withstand the ramming pressure. Side bars 19 and 20 preferably comprising cast flanged bars are mounted on two of the core box side members at the bottom thereof form rigid supports for the bottom of these side members. These flanged bars are provided with openings at their ends, which openings are adapted to be secured by dowel pins 21 or otherwise to the flange of the ramming base 1. The flange bars are constructed in such manner as to provide flange supports 22 for the bottom side sills 24 on the side members 9 and 10.

The upper end of the guide post 2 carries a socket member 26 and also the upper end of one of the core box side members, for example, the member 10 likewise carries a socket member 27. A centering link 28 is provided with downwardly depending ends adapted to lit the socket members 26 and 27 and thereby position and steady-the upper end of the core box.

The core bar 5 is rigidly attached to the core bar base 1- by means of suitable stub bolts 29 or other securing means and preferably the core bar is provided with gas openings 30.

From the foregoing construction, it will be observed that the core bar is definitely and rigidly positioned in the ramming base by means of the machined faces 6 and 7 and with the bottom of the core base setting on the lower flange of the ramming base so that the relation between the ramming base and the core box is an accurate one. The flange supports 22 being secured by dowel pins or otherwise to the ramming base accurately and fixedly secures the bottom portion of the core box in position around the bottom of the core bar. The centering link 28 cooperating with the socket member 27 on the core box and the socket member 26 on the guide arm accurately and definitely positions the upper end of the core box relative to the core bar. It therefore will appear that accuracy of assembly is maintained throughout the entire set-up, so that when mold sand is rammed into the recess in the core base and is rammed between the core box and the core, that an accurate straight sided sanded core bar is the result. In view of the fact that in the manufacture of ingot molds. different customers desire different radii on the corners of the matrix of the moldas well as slight variations in size of the matrices of the ingot molds, it is necessary that sanded core bars having these differences be provided; The present construction lends itself to considerable flexibility of equipment without requiring the carrying of complete setups and other equipment. In the present case, different sized core boxes may be set up on the ramming base by using flange bars having dowel pin openingsarranged to cooperate with the flask or by providing a plurality of holes for the dowel pins in the flange of the. flask, and by providing centering links of difierent lengths to cooperate between the upper end of the guide post 2 and the upper ends of core boxes of different sizes. The variations in shapes, etc., are provided by having Wooden side members of the core box constructed in such manner as to form the required diflerent shapes in the sand, which is rammed around the core bar.

Having thus described my invention, what I claim is v I 1. A core bar ramming box for ingot molds comprising a ramming base, a guide post rigidly secured to said ramming base, a sectional core box, 'a pair of flange supports on said core box for supporting the base of said core box, means for securing said flange supports to said ramming base to center the bottom of said core box relative to said rammingbase, and centering means cooperating with the upper end of said guide arm and the upper end of said core box to center the upper end of said core box relative to said ramming base, said centering means being outside said core box to leave a free space around the top of said core bar to facilitate sand ramming said core bar. 7

2. An apparatus for use in sanding core bars for ingot molds comprising a ramming base, a vertical guide post secured to one side of said ramming base, said ramming base being provided with means to center a core bar base, a core bar centered at both top and bottom by said ramming base, a plurality of side members adapted to be assembled to comprise a core box, means to center the. bottom of said core box on said ramming base, and a centering link outside of said core box adapted to cooperate with attaching means on the top of said guide posts and on the top of said core box to center said core box relative to said guide post.-

3. A core bar ramming box for ingot molds comprising a ramming base, a guide post rigidly secured to said ramming base, a core box comprising a plurality of separable sides, pin means to lock said sides together to form the core box, means to loclc the base of said core box to said ramming base, a core bar, means to center the base of said core bar insaid ramming base and within the base of said core box, and U- shaped detachable link means between the upper end of said guide post and the upper end of said core box to center the upper end of said core box relative to said core bar.

JOHN EDMUND PER-RY. 

